Construction process for pouring large-gradient curve roof

Abstract

The invention discloses a construction process for pouring a large-gradient curve roof, and relates to the field of buildings, and the construction process comprises the following steps: mounting an inclined roof formwork, binding reinforcing steel bars, arranging a closure plugboard, erecting an operation platform, pouring inclined roof concrete, and dismantling the formwork. According to the arrangement of the closure inserting plates, the pouring thickness of concrete is controlled through the scraping bars, the pouring efficiency is improved, and workers are prevented from stepping on steel bars; zero-block pouring of the inserting plate is adopted, the inserting plate is pulled out before initial setting, when a vibrating rod vibrates concrete in a point vibration mode, unconstrained natural sliding of the concrete on a slope can be prevented, and the effect that the interior is solid and the exterior is smooth is achieved; concrete voids and pitted surfaces caused by a traditional mode are effectively avoided, the thickness, the section size and the curve radian of the pitted roof concrete plate are effectively controlled, the construction progress is accelerated, the construction period is shortened, funds are saved, the construction cost is reduced, the project quality is guaranteed, maintenance work is reduced, and the requirement for the roof waterproof effect is met.

Description

Technical Field

[0001] The present invention relates to the field of construction, and particularly to a construction process for pouring a large-slope curved roof. Background Art

[0002] With the continuous development of construction technologies, in recent years, a large number of civil buildings, especially some villas, oceanariums and other buildings, have adopted sloping roof designs. The sloping roof can not only effectively resist seepage and leakage, provide heat insulation and smooth drainage, and improve the living environment on the top floor, but also increase the usable space of the building, improve the space utilization rate and enhance the aesthetic effect, which meets the growing demand of the residential construction market. There are usually two methods for existing large-slope inclined roofs: one is to pour concrete by the manual ramming method, which is relatively commonly used but it is difficult to control the compactness of the concrete, and it is easy to have quality problems such as pitted surface and exposed reinforcement, resulting in quality common problems such as roof leakage; the other is the double-sided formwork method, where it is easy to have quality problems such as honeycombing and dog holes due to insufficient vibration of the concrete, and the construction cost is relatively high. How to effectively control the thickness, cross-sectional dimensions and curve radian of the concrete slab of the curved sloping roof to avoid the honeycombing and pitting of the concrete caused by the traditional method and ensure the quality of the concrete pouring is also a problem that needs to be solved at the construction site. Summary of the Invention

[0003] The purpose of the present invention is to provide a construction process for pouring a large-slope curved roof to solve the above problems.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A construction process for pouring a large-slope curved roof of the present invention includes the following steps:

[0006] A. Installation of the inclined roof formwork support: The vertical pipes use steel pipes with a diameter of Ф48X3.5 as the support system, and the full hall fastener type is adopted;

[0007] B. Steel bar binding: When binding the steel bars of the sloping roof slab, draw the spacing of the bidirectional steel bars according to the drawing requirements. First, place the bent steel bars in the double-slope direction and then place the horizontal steel bars, and at the same time carry out temporary binding and fixing. When binding the steel bars, each intersection point should be firmly bound, and the wire buckles at adjacent binding points should form an eight-character shape to prevent the steel bar mesh from deforming and skewing. Concrete circular pads are used under the double-layer bidirectional slab steel bars to meet the requirements of the steel bar protection layer, and concrete stools are used between the double-layer steel bars and firmly bound to the upper-layer steel bars;

[0008] C. Arrangement of the cut-off inserts: After the steel bars are bound, place an insert every about 1.35 meters along the length direction of the sloping roof. Angle steel with equal sides of L30X3 is spot-welded on both sides above the insert to control the pouring thickness when pouring concrete and ensure the thickness of the concrete;

[0009] D. Setting up the operating platform: Setting up the operating platform just above the roof ridge before pouring concrete;

[0010] E. Concrete pouring for inclined roof: pour from bottom to top in sections, with the distance between two partitions as one section. Start pouring from all sides and pour upwards step by step, and vibrate. The rod distance is controlled at 20 to 30 cm. When dismantling, slowly pull up from one end of the plug board to the other end;

[0011] F. Formwork removal: When the concrete reaches about 1Mpa, remove the operating platform.

[0012] Furthermore, when the sloping roof formwork is installed, according to the scaffolding construction plan, the vertical and horizontal spacing of the vertical pipes is 1.2m, and a sweeping rod is set vertically and horizontally at a position where the vertical pipe is no more than 20cm above the ground, and a vertical and horizontal pull rod is set every 1.5m above.

[0013] Furthermore, when the steel bars are tied, the bending of the steel bars is completed by a cold bending machine according to the designed angle to ensure its structural dimensions.

[0014] Furthermore, when the intercepting plug is arranged, a circular hole with a diameter of 50 mm is opened 75 mm above the angle steel to insert a scaffolding pipe in the longitudinal direction to fix the plug, and L-shaped steel bars are spot-welded on the bottom reinforcement as clamping bars to fix the position of the steel plate.

[0015] Furthermore, when setting up the operating platform, the arrangement of the vertical poles and horizontal poles is the same as that of the full-floor scaffolding. The vertical poles are raised to 1.5 meters above the working platform. At least two horizontal bars are set as handrails within this range, and diagonal braces are set in the bottom area of ​​the board.

[0016] Furthermore, when pouring concrete for a sloping roof, the distance between two partitions is 1.35 meters, which is the optimal segmentation distance. Concrete with a slump between 140 and 160 mm can be point-vibrated within this distance and will not freely slide down and accumulate over a large area, reducing the difficulty of vibrating the concrete.

[0017] Furthermore, after the commercial concrete is poured, plastic film method is used for maintenance. In summer, this method should also be accompanied by sun protection facilities to provide sun protection for more than 24 hours.

[0018] Furthermore, when removing the formwork, the side panels should be removed first, and then the bottom panel. The removed formwork and accessories should be neatly put away for the next use.

[0019] Compared with the prior art, the beneficial technical effects of the present invention are:

[0020] The arrangement of the interception plug plate of the present invention uses a scraper to control the pouring thickness of concrete, thereby improving the pouring efficiency and preventing workers from stepping on steel bars;

[0021] The plug-in board is used for zero-block pouring, which is pulled out before the initial setting. The vibrating rod can prevent the concrete from sliding down naturally on the slope surface without restraint when vibrating the concrete, achieving the effect of solid inside and bright outside.

[0022] It effectively avoids the honeycombed surface of concrete caused by traditional methods, effectively controls the thickness, cross-sectional size, and curve radius of the sloping roof concrete slab, speeds up the construction progress, shortens the construction period, saves money, reduces construction costs, ensures project quality, reduces maintenance work, and achieves the requirements of roof waterproofing. DETAILED DESCRIPTION

[0023] A construction process for pouring a large-slope curved roof comprises the following steps:

[0024] A. Installation of the formwork for the inclined roof: The vertical pipe adopts Ф48X3.5 steel pipe as the support system, and adopts the full-floor fastener type. According to the scaffolding construction plan, the vertical and horizontal spacing of the vertical pipe is 1.2m. A sweeping rod is set vertically and horizontally at a position where the vertical pipe is no more than 20cm above the ground, and a vertical and horizontal tie rod is set every 1.5m above;

[0025] B. Rebar binding: When binding the sloping roof reinforcement, draw the spacing of the two-way reinforcement according to the requirements of the drawings, first place the bent reinforcement in the double slope direction and then place the horizontal reinforcement, and perform temporary binding and fixing at the same time. When binding the reinforcement, each intersection must be firmly bound, and the wire buckles at adjacent binding points must form an eight-shaped shape to prevent the steel mesh from deforming and tilting. Concrete circular pads are used at the bottom of the double-layer two-way slab reinforcement to meet the requirements of the reinforcement protection layer. Concrete horse stools are used between the double-layer reinforcements to bind them firmly with the upper layer of reinforcement. The bending of the reinforcement is completed by a cold bending machine according to the designed angle to ensure its structural dimensions;

[0026] C. Arrangement of interception plugs: After the steel bars are tied, a plug is placed every 1.35 meters along the length of the sloping roof. L30X3 equilateral angle steels are spot welded on both sides of the plug to control the pouring thickness when pouring concrete to ensure the thickness of the concrete. A 50mm diameter round hole is opened 75mm above the angle steel to insert the scaffolding pipe in the longitudinal direction to fix the plug. L-shaped steel bars are spot welded on the bottom reinforcement as clamping bars to fix the steel plate;

[0027] D. Setting up the operating platform: Before pouring concrete, set up the operating platform just above the roof ridge. The arrangement of the vertical poles and horizontal poles is the same as that of the full-floor scaffolding. The vertical poles are raised to 1.5 meters above the operating platform. At least two horizontal poles are set as handrails within this range, and diagonal braces are set in the bottom area of ​​the slab to facilitate construction workers to work on the platform and avoid stepping on the steel bars;

[0028] E. Casting of concrete for inclined roof: During casting, it is carried out in sections from bottom to top, with the distance between two partitions as one section. When casting, it starts from the periphery and is gradually poured upward in sections and vibrated. The rod spacing is controlled at 20 - 30 cm. When removing, it is slowly pulled out from one end of the plug board to the other end. The distance of 1.35 meters between two partitions is the optimal section distance. For the concrete within the slump range of 140 - 160 mm, point vibration can be achieved within this distance and it will not freely slide downward in a large range and pile up, reducing the vibration difficulty of the concrete;

[0029] F. Removal of formwork: When the concrete reaches about 1 Mpa, remove the operation platform. Before removal, promptly remove the sundries on the platform. When removing the formwork, first remove the side formwork and then the bottom formwork. The removed formwork and fittings should be neatly stored for reuse next time.

[0030] In the layout of the cut-off plug board, in addition to controlling the elevation, flatness and plate thickness of the concrete during the concrete casting process, the plug board also serves as a cut-off barrier to reduce the gravity drop and achieve the sectional casting of the concrete.

[0031] After the commercial concrete is cast, the plastic film method is used for curing. This method can directly cover the plastic film on the surface of the concrete to isolate the concrete component from the air, so that the water in the concrete no longer evaporates and the hydration reaction is completed. In summer, sun protection facilities should also be added for this method, and the sun protection time should be greater than 24 hours, otherwise it will cause filamentous cracks in the concrete.

[0032] The embodiments described above are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A construction process for pouring a steep curved roof, characterized in that: The following steps are involved: A. Installation of sloping roof formwork: The vertical pipe adopts Ф48X3.5 steel pipe as the support system, and adopts full-height fastener type; B. Rebar binding: When binding the reinforcement of the slope roof panel, draw the spacing of the two-way reinforcement according to the requirements of the drawing, first place the bent reinforcement in the double slope direction and then place the horizontal reinforcement, and perform temporary binding and fixing at the same time. When binding the reinforcement, each intersection must be firmly bound, and the wire buckles at adjacent binding points must form an eight-shaped shape to prevent the steel mesh from deforming and tilting. Concrete circular pads are used at the bottom of the double-layer two-way slab reinforcement to meet the requirements of the reinforcement protection layer, and concrete horse stools are used between the double-layer reinforcements to bind them firmly with the upper reinforcement; C. Arrangement of interception plugs: After the steel bars are tied, a plug is placed every 1.35 meters along the length of the sloping roof. The L30X3 equilateral angle steels are spot welded on both sides of the plug to control the pouring thickness when pouring concrete to ensure the thickness of the concrete; D. Setting up the operating platform: Setting up the operating platform just above the roof ridge before pouring concrete; E. Concrete pouring for inclined roof: pour from bottom to top in sections, with the distance between two partitions as one section. Start pouring from all sides and pour upwards step by step, and vibrate. The rod distance is controlled at 20 to 30 cm. When dismantling, slowly pull up from one end of the plug board to the other end; F. Formwork removal: When the concrete reaches about 1Mpa, remove the operating platform.

2. The construction process for pouring a steep curved roof according to claim 1 is characterized in that: When installing the sloping roof formwork, according to the scaffolding construction plan, the vertical and horizontal spacing of the vertical pipes is 1.2m, and a sweeping rod is set vertically and horizontally at a position where the vertical pipe is no more than 20cm above the ground, and a vertical and horizontal pull rod is set every 1.5m above.

3. The construction process for pouring a steep curved roof according to claim 1 is characterized in that: When tying the steel bars, the bending of the steel bars is completed by a cold bending machine according to the designed angle to ensure its structural dimensions.

4. The construction process for pouring a steep curved roof according to claim 1 is characterized in that: When arranging the intercepting plug plate, a circular hole with a diameter of 50 mm is opened 75 mm above the angle steel to insert the scaffolding pipe in the longitudinal direction to fix the plug plate, and L-shaped steel bars are spot welded on the bottom reinforcement as clamping bars to fix the position of the steel plate.

5. The construction process for pouring a steep curved roof according to claim 1 is characterized in that: When setting up the operating platform, the arrangement of the vertical poles and horizontal bars is the same as the full-floor scaffolding. The vertical poles are raised to 1.5 meters above the working platform. At least two horizontal bars are set as handrails within this range, and diagonal braces are set in the bottom area of ​​the board.

6. The construction process for pouring a steep curved roof according to claim 1 is characterized in that: When pouring concrete for a sloping roof, the distance between two partitions is 1.35 meters, which is the optimal segmentation distance. Concrete with a slump between 140 and 160 mm can be point-vibrated within this distance and will not slide freely and accumulate on a large scale, reducing the difficulty of vibrating the concrete.

7. The construction process for pouring a steep curved roof according to claim 1 is characterized in that: After the commercial concrete is poured, plastic film method is used for maintenance. In summer, this method should also be accompanied by sun protection facilities to provide sun protection for more than 24 hours.

8. The construction process for pouring a steep curved roof according to claim 1 is characterized in that: When removing the formwork, remove the side panels first and then the bottom panel. The removed formwork and accessories should be neatly placed for next use.